Heat the olive oil over medium-low heat in small saucepan. Once the oil begins to warm, whisk in crab boil seasoning. Bring the mixture up to a simmer and when it starts to foam, remove from heat and allow it to cool completely.
Process the butter in a food processor until smooth and creamy. Add the seasoned olive oil and a pinch of salt, the lemon zest, and process until blended well.
Purchase your favorite baguettes, slice lengthwise. Place baguettes over medium heat on the grill, cook on each side until a golden brown color is achieved. Remove from grill, slather with seasoned butter, cut and serve with grilled linguica sausage.
Cook's note: The seasoned butter can be refrigerated for 1 week and frozen for up to 6 months. Refrigerate until just firm enough to shape into a log roll. Put an 18-inch sheet of foil on work surface. Lay the butter down the center of the foil, forming a log about 1 1/2 inches thick. Wrap in foil and twist the ends to make a sealed log, like a tootsie roll. Remove your seasoned butter from the refrigerator and allow to reach room temperature before using.